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ASTM A193

  • Standard Specification for Alloy Steel and Stainless Steel for High Temperature or High Pressure Service and Other Special Applications.

  • Common ASTM A193 Grades Supplied by BSMI.

    B7 Allow Steel, AISI 4140/4142 Quenched and Tempered
    B8 Class 1 Stainless Steel, AISI 304, Carbide Solution Treated
    B8M Class 1 Stainless Steel, AISI 316, Carbide Solution Treated
  • A193 Mechanical Properties

    Grade Size Tensile Ksi, Min Yield Ksi, Min Elongation %, Min RofA %, Min
    B7 Up to 2-1/2 125 105 16 50
    2-5/8 to 4 115 95 16 50
    4-1/8 to 7 100 75 18 50
    B8 CL 1 ALL 75 30 30 50
    B8M CL 1 ALL 75 30 30 50
  • A193 Chemical Properties

    Element B7(4140) % B8(304) % B8M(316) %
    Carbon 0.37 - 0.49 0.08 Max 0.08 Max
    Manganese 0.65 - 1.10 2.00 Max 2.00 Max
    Phosphorus, Max 0.035 0.045 0.045
    Sulfur, Max 0.04 0.03 0.03
    Silicon 0.15 - 0.35 1.00 Max 1.00 Max
    Chronium 0.75 - 1.20 18.0 - 20.0 16.0 - 18.0
    Nickel N/A 8.0 - 11.0 10.0 - 14.0
    Molybdenum 0.15 - 0.25 N/A 2.00 - 3.00
  • A193 Recommended Hardware.

    Grade Nuts Washers
    B7 A194 Grade 2H F436
    B8 Class 1 A194 Grade 8 304ss
    B8M Class 1 A194 Grade 8M 316ss
  • The provided information was taken directly form the listed ASTM Standard, Additional information can be found in ASTM A193-12b.

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